Răspuns :
(x+133):7-869 = 500-109
(x+133):7-869 = 391
(x+133):7 = 391+869
(x+133):7 = 1260
x+133 = 1260*7
x+133 = 8820
x = 8820-133
x = 8687
(x+133):7-869 = 391
(x+133):7 = 391+869
(x+133):7 = 1260
x+133 = 1260*7
x+133 = 8820
x = 8820-133
x = 8687
(x+133):7-869=500-109
(x+133):7-869=391
(x+133):7=391+869
(x+133):7=1260
(x+133)=1260x7
x+133=8820
x=8820-133
x=8687
(x+133):7-869=391
(x+133):7=391+869
(x+133):7=1260
(x+133)=1260x7
x+133=8820
x=8820-133
x=8687